Benaiah fitts



@eine tetes @anni @frn BENAIAH FITTS, O F NEWARK, NEW JERSEY.

Letters .Patent No. 66,820, dated July 16, 1867.

IMPROVEMENT IN PIPE-COUPLINGS..

@ige Stimuli retentit tu in tlgese @eine zitmt ma making @uit nf tige samt TO ALL WHOM `IT' MAY CONCERN:

Be it lnown that I, BENAIAH FITTS, of Newark, county of Essex, Stilte of New Jersey, have invented a. new and useful Improvement in Pipe-Couplings, for coupling together steam, gas, or Water pipes; and I do herebT declare that the following is a full, clear, and exact description of the construction and Operation of the same, reference beingr hailto the annexed drawing, making a part of this specication.

The figure is a longitudinal section designed to represent two pieces of pipe screwed into a. steam-chest and then coupled together.

The construction is as follows: g is a plate of iron,nnd is supposed to represent one side of a steam-chest a and b are two pieces 0f pipe; c is the coupling or nut by which the pipes a and h are drawn and held together? e is a packing of'leather, rubber, or other suitable substance. At r 1' on pipe a is a. screw formed, also at se on pipe b, but the thread or serew on ZJ is much ner or less pitch than thethread on a. 'lhe diameter ofjhthej-,pipe a at the base of the thread (shown :Lt t) shouldbe as large as the diameter of pipe b at the extreme ontside'cf the thread(shown aty.) lhe coupling is then made as shown.A A thread formed in one end to correspond Vwith that on pipe a, andthat in the other to correspond with threadon pipe b. The outside of the conpling'ifc'i'rined convenient for the wrench.

To couple the pipes together, the coupling should be first turned on to pipe b far enough to bring theenldw of the pipe and the endof the coupling nearly even. lThe packing e is then put in and pipe a brought'up against it. The coupling is then turned loff of pipe b 0n to pipe a. The thread on pipe a being 'coarser tharii ipe' b of course runs faster and draws thejoints together enough to insure a tight joint in the packing. The uti I of the coupling consists not only in its simplicity and efficiency, but it will be seen that it may be used where others cannot. Whatconstitutes ,the pecul'ia-l` feature of my invention is forming the4 thread on' one pipe :rnd one end of the coupling finer or less pitch than that of the other, as shown.

Thus having fully-set forth my invention, what I claim}is-' i A pipe-coupling, constructed substantially as herein described.

BENAIAH Flr'rs. i

Witnesses:

C. HALsaY CANFIELD, J. N. DENNIssoN. 

